Peptides

Cysteine peptide (Ac RFAAKAA COOH) is used in combination with Lysinepeptide (Ac RFAACAA COOH) in the Direct Peptide Reactivity Assay (DPRA) test.
Direct Peptide Reactivity Assay is used in cosmetic applications for the characterization of the skin sensitizing potential of a substance, framed by OECD Guideline no 442.
The molecular initiating event (MIE) in skin sensitization is a binding between epidermal proteins and the sensitizing chemical substance. MIE is part of the adverse outcome pathway (AOP) of skin sensitization.
It is thanks to the properties of Lysine peptide and Cysteine peptide that the chemical binding will be able to take place, so these synthetic heptapeptides will mimic the reaction of a skin exposed to a substance.
Binding between nucleophilic proteins and electrophile substance will be measured by High Performance Liquid Chromatography (HPLC). Therefore, the decrease in Lysine peptide and Cysteine peptide levels will be a sign of sensitizing event. Depending on the rate of depletion, the sensitizing character of a molecule will be determined (see table at the bottom of the page).
In chemico DPRA test also has wider applications such as hazard classification in cosmetics, but also for pharmaceuticals and biocides. It is a good alternative to animal experimentation.

AMC is a peptide that acts as an activator of the nicotinic acetylcholine receptor. AMC is a high-purity, ion channel ligand with a CAS No. 26093-31-2. It is used in life science research to study cell biology and pharmacology. AMC has been shown to be an inhibitor of the enzyme acetylcholinesterase (AChE) in rat brain slices and it has been reported that it can inhibit the proliferation of human leukemia cells.END>

This product has disulfide bonds between Cys1-Cys15 and Cys3-Cys11 and is available as a 0.1mg vial. Big Endothelin-1 (Human, 1-38) is part of the full lengthed 29 amino acid peptide Big Endothlin-1 which is a precursor peptide of the vasoconstrictorEndothelin-1 (ET-1). ET-1 exhibits vasoconstrictive properties and is an activator of endothelin G-protein coupled receptors. Furthermore ET-1 is produced when inflammation, vascular stress or hypoxia occurs. In vivo Big Endothelin-1 has a greater half life compared to ET-1 and therefore makes it useful to study secretory activity in the endothelial system.
Overall Big Endothelin-1 (Human, 1-38) can be used as a research tool for studying protein interactions, receptor activation and function, and ligand binding. This peptide is also used in pharmacology to study the effects of therapeutic agents on receptor activity and expression.

Custom research peptide; min purity 95%.

Azido-dPEG®3-Amine is a PEG compound with two different functional groups (also known as heterobifunctional). Unlike homobifunctional PEG compounds (same functional group on both ends), this type of compounds are more versatile as have two different anchor points. Azido-dPEG®3-Amine is used as a linker and spacer to add a PEG moiety, via pegylation (a bioconjugation technique) to proteins, peptides, oligonucleotides, small molecules and nanoparticles.

Custom research peptide; min purity 95%.

Custom research peptide; min purity 95%.

A synthetic peptide for use as a blocking control in assays to test for specificity of PSMD1 antibody, catalog no. 70R-5638

CJC-1295 is a synthetic peptide, which is an analogue of growth hormone-releasing hormone (GHRH). It is synthesized through recombinant DNA technology, which allows for precise control over its sequence and length. This particular peptide is designed to bind to GHRH receptors in the pituitary gland. By activating these receptors, CJC-1295 stimulates the release of growth hormone (GH) into the bloodstream.The primary function of CJC-1295 is to influence the endocrine system, particularly enhancing the release of endogenous growth hormone. It achieves this by increasing the amplitude and frequency of GH pulses without affecting the natural negative feedback mechanisms that regulate GH production. This mode of action distinguishes CJC-1295 from other growth hormone therapies, as it promotes a more physiological pattern of hormone secretion.CJC-1295 is used in various scientific contexts, primarily in research focusing on growth hormone deficiencies, muscle wasting conditions, and certain metabolic disorders. Its ability to increase GH release also makes it a subject of interest in studies related to aging, tissue repair, and regeneration. The longer half-life of CJC-1295 compared to natural GHRH peptides further enhances its applications in research, allowing for more sustained and controlled experimentation.

H-His-Arg-OH is a synthetic peptide that has been shown to have cytotoxic effects on mammalian cells. The H-His-Arg-OH peptide can be used for the treatment of heart disease and autoimmune diseases, such as rheumatoid arthritis. This peptide has been found to be resistant to congestive heart failure, which is caused by a number of factors, including hypertension and valvular stenosis. It has also been shown to have an immunoglobulin G1 (IgG1) genotype.

Myelin oligodendrocyte glycoprotein (MOG) is a myelin protein found in the central nervous system. MOG is a ligand for CD200, which is an inhibitory receptor expressed by astrocytes. It has been shown that MOG can induce the proliferation and differentiation of primary cultures of rat astrocytes in vitro. MOG induces the production of reactive oxygen species in mitochondria and increases the expression of acid-binding protein, which are both important factors in the demyelination process. MOG has also been implicated as a potential factor in the development of multiple sclerosis. Further research into this protein may lead to new treatments or cures for disorders such as encephalomyelitis, nervous system diseases, or even cancer.

Catalogue peptide; min. 95% purity

H-Ser-Ile-Lys-Val-Ala-Val-OH is a peptide that is synthesized from the amino acid sequence of the human skin cells. It has been shown to be effective in inhibiting bacterial growth and inducing death in bacteria. This peptide binds to the bacterial cell wall and inhibits its growth. The polymer film can be used for the delivery of H-Ser-Ile-Lys-Val-Ala-Val-OH in the form of lamellar, galacturonic acid, collagen, or lipid nanoparticles. The lamellar phase can be prepared by using water as solvent and lipids as surfactant. The lipid nanoparticle formulation consists of a core material (e.g., cholesterol) surrounded by a lipid bilayer composed of phospholipids or glycolipids with H Ser Ile Lys Val Ala Val OH incorporated into it. This peptide has also been shown to have skin care properties when